"My Mai: Koakuma na A Cup" is a short-form anime series that blends comedy, romance, and supernatural elements. The story centers around Mai, a high school student who inadvertently becomes the master of a mischievous cupid-like demon named Aoi. Aoi, who resides in a magical A-cup bra, is tasked with helping Mai find love, but her methods often lead to chaotic and humorous situations.

Mai is initially skeptical of Aoi's abilities and intentions, but as the series progresses, she becomes more open to the idea of romance. Aoi, despite her playful and sometimes selfish demeanor, genuinely wants to help Mai, though her interventions frequently result in misunderstandings and awkward encounters. The dynamic between Mai and Aoi drives much of the narrative, with Aoi's magical powers causing both comedic mishaps and moments of genuine emotional connection.

The series explores themes of self-confidence, the complexities of relationships, and the challenges of navigating adolescence. Supporting characters, including Mai's classmates and potential love interests, add depth to the story, creating a variety of interactions that highlight different aspects of romance and friendship. The episodic structure allows for a mix of standalone comedic scenarios and ongoing character development.

While the premise is lighthearted and often absurd, the series occasionally delves into more heartfelt moments, particularly as Mai begins to reflect on her own feelings and desires. The interplay between the supernatural elements and the everyday struggles of high school life creates a unique blend of humor and sincerity, making "My Mai: Koakuma na A Cup" a distinctive entry in the romantic comedy genre.